Locomotive-truck.



F. A. ISAACSON.

LOCOMOTIVE TRUCK. APPLICATION r1150 AUG115. 1911.

' 11116111111 July 16, 1918.

man A. ISAACSON, or 'rePEKA, :K'ADYSAS.

LQCGMGTIVE-TiR-UCK.

Specification of Letters Patent.

Patented July dlfi, it-@518.

Application filed August 15, 1917. Serial No..186,410.

To all .wlwm iztmcy concern Be it 'known that I, FRED A. ISAACSON, a

citizen of the United States, residing at.

Topeka, 'Kansas, have invented a certain 5 new and useful Improvement in Locomotive-.Illrucks, of which the following is a full, clear, and exact description, suchas will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying fdrawings, forming part of this specification.

' My invention relates to a locomotive truck, the principal objects of my invention being to generally improve upon and sunplify the existing. types of four .wheel trucks; toprovide a truck having a frame. wherein the principal members are lute grally formed, thereby insuring great strength and rigidity of structure and at the sametime eliminating the time, labor and consequent; expense i'nv olved'in assembling a fabricated structure; to provide a truck wherein the pedestal jaws are formed integral withv the side members of the frame, and further, toarrange transversely disposed tie, members between the corresponding pedestals, thereby enhancing the general strength and rigidity of the entire frame structure. v

With the foregoing and other objects in View, my invention consists in certain novel features of construction and arrangement of parts,'hereinafter more fully described and claimed, and illustrated in 'the accompanying drawings, in which- I Figure 1 is a planview of a locomotive truck of my improved construction, a portion thereof being shown in horizontal sectlOIl' 1 I Ffg. 21's a side elevational View of the truck with a portion thereof in vertical section' Fig. 3 is an end vievi of the truck.

Referring by numerals to the accompanying drawings, 10, 10, designate the side members or wheel pieces of the truck frame, the same being of any desired shape in cross section, though preferably hollow, and connecting the central portions of said wheel pieces are transom. members 11, which ,;are spaced a suitable distance apart.

Formed integral with and depending from the end portions of the side members or wheel pieces 14} are pedestal jaws 12, ar'- 555' ranged in pairs, and securedin any suitable manner to the lower ends of the aws of- -each rail or wheel pieceand underlying the journal box openings between said jaws are tic bars I3.

The outer pedestals are connected-"to each 'other transversely of "the frame by integrally formedend rails 14, the same being of any desired shape "in cross section, pre'fertfbly channels with inwardly presented flanges. The inner pedestals are connected to each other, transversely of the frame, by

separately formed rails 15, the-ends thereof being secured to the jaws in an suitable manner, preferably by means 0 bolts or rivets.

By forming the'transoms l1 and end rails 14 integral with the wheel pieces 10 and by forming the end rails 14; integral with the outer pedestal jaws 12, a very stron substantial structure is provided which is and well able to .resist all ordinary service shocks and vibration. Such construction also materially reduces the number of joints in the frame, and in this connection it will be understood that joints'in a structure of this character are liable to open or become loose as a result of constant vibration'inservice. Furthermore,- theintegral construction eliminates considerable machine" work, and'likewise, the time and labor involved in setting the necessary bolts and riv ets for a truck frame of assembled or fabricalted structure.

A locomotive truck of myimproved construction is comparatively simple, can be easily manufactured, meets the M. C. B. re-

. quir ements and, provides a very desirable and effective piece of equipment for the present types of locomotives.

It will be'readily understood that minor changesin the size, form and construction of the various parts of my improved 1000- motive truck can be made and substituted for those herein shown and described, withthe outer ones of the pedestals at both endsv ofsa-id frame, and separable rails connecting the inner ones of the pedestals.

2, A locomotive truck having a frame comprising wheel pieces, transom members formed integral therewith, pedestal jaws in-. tegral with the end portions of said wheel ieces, and rails connecting both the mem. ers of the pairs of pedestals transversely thereon, rails integral, With and connecting the outer members of the pedestals, and rails connecting the inner members of the pedestals transversely of the truck. I

4, In a locomotive truck, a frame, havinging the, outer ones of the pedestals at both 1 ends of the frame, and transversely disposed rails dctachably connected to the inner ones of the pedestals.

In testimony whereof I hereunto aflix my signature this 31 day of July, 1917.

' FRED A. ISAACSON.

Witnesses:

J. G. Mcnmm, F. W. salmon. 

